21027930084 has 36 divisors (see below), whose sum is σ = 60747354304. Its totient is φ = 6007979952.

The previous prime is 21027930061. The next prime is 21027930109. The reversal of 21027930084 is 48003972012.

21027930084 is a `hidden beast` number, since 2 + 1 + 0 + 279 + 300 + 84 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41721832 + ... + 41722335.

Almost surely, 2^21027930084 is an apocalyptic number.

It is an amenable number.

21027930084 is an abundant number, since it is smaller than the sum of its proper divisors (39719424220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21027930084 is a wasteful number, since it uses less digits than its factorization.

21027930084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83444184 (or 83444179 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 21027930084 in words is "twenty-one billion, twenty-seven million, nine hundred thirty thousand, eighty-four".